add_subdirectory(1_color)
add_subdirectory(2_1_basic_lighting_diffuse)
add_subdirectory(2_2_basic_lighting_specular)
add_subdirectory(3_1_materials)
add_subdirectory(3_2_materials_exercise1)
add_subdirectory(4_1_lighting_maps_diffuse)
add_subdirectory(4_2_lighting_maps_specular)
add_subdirectory(4_3_lighting_maps_exercise4)
